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參數資料
| 型號： | T4258NFNG3 |
| 廠商： | ATMEL CORP |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO44 |
| 封裝： | SSOP-44 |
| 文件頁數： | 19/38頁 |
| 文件大?。?/td> | 443K |
| 代理商： | T4258NFNG3 |
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26
T4258N
4566B–AUDR–02/04
9.7
Maximum differential
output voltage
AM/WB
V
S = 8.5 V
23, 24
12
Vpp
D
9.8
Maximum differential
output voltage FM
23, 24
1
Vpp
D
9.9
Input resistance
26
270
330
400
D
9.10
LO input voltage
22
80
500
mVpp
D
9.11
LO input resistance
22
1
k
D
9.12
LO input bias voltage
22
2.8
3.0
3.2
V
A
10
2
nd IF Amplifier (Bit 55 = 0)
10.1
Input resistance
Pin 27 AC-grounded
28
3
k
D
10.2
Voltage gain
AM/WB mode
(Bit 93 = 1)
Pin 28 1 mVrms
28, 20
42
45
48
dB
A
10.3
Gain control range
AM/WB mode
(Bit 93 = 1)
47
dB
D
10.4
DC output voltage
20
3.4
3.7
4.0
V
A
10.5
AC output voltage
Unmodulated signal,
82 dBV at pin 1
(IF AGC active)
Bit 93 = 1
20
150
180
230
mVrms
A
10.6
Output impedance
Small signal
20
70
D
11
FM Demodulator Integrated Band-filter, FM Mode (Bit 92 = 1, Bit 93 = 0), BW Setting 2
nd IF Filter = 120 kHz
11.1
AC output voltage
Deviation = ±75 kHz,
f
mod = 1 kHz
11
420
480
540
mVrms
B
11.2
Stereo roll-off
Deviation = ±75 kHz,
f
mod = 38 kHz
(reference: 1 kHz)
11
-2.0
dB
D
11.3
Total harmonic
distortion
Deviation = ±75 kHz,
f
mod = 1 kHz
11
THD
FM
0.4
0.7
%
A
11.4
Maximum signal-to-
noise ratio
Dev. = ±22.5 kHz,
f
mod = 1 kHz, 50 s
de-emphase, signal
input at 450 kHz
11
(S/N)
FM
65
dB
C
12
Soft Mute, FM Mode (Bit 92 = 1, Bit 93 = 0, Bit 80 = 0)
12.1
Mute gain
Bit 67 = 0,
V (pin 34) = 2 V
11
-28
-26
-24
dB
A
12.2
Mute gain
Bit 67 = 1,
V (pin 34) = 2 V
11
-24
-22
-20
dB
A
13
AM Demodulator, AM Mode (Bit 92 = 0, Bit 93 = 1)
13.1
AC output voltage
Modulation depth =
30%, f
mod = 1 kHz
11
135
150
170
mVrms
A
Electrical Characteristics (Continued)
Test conditions (unless otherwise specified): VS = 8.5 V, Tamb = 25°C
No.
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
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